Switching

Hi Netproi have 2960 switch connected via two uplinks <LINK A  towards CORE-1 and LINK B to CORE-2 , both link are equal , STP Chosen LINK A as primary while LINK B as secondary , how can play with stp and Make LINK B the Primary while LINK A the sec...

Hi - I'm working on a design with two different ISP providers. I'm running BGP with the providers and advertising my company owned address block. AS-prepending on one side. That's working fine. I'm running OSPF in the inside with a Check Point firewa...

Hello,we have a problem with the throughput over etherchannel in LACP with 2 or 4 ports.It is iSCSI traffic (vmware esxi 4.1 U3) is going from 2 separate NICs (ports) to the etherchannel (with 2 or 4 ports) that has a SAN connected (Nexenta).The SAN ...

I ran into problem with design that was prepared for Catalyst 6500, but in the meantime infrastructure got upgraded to Nexus. I have two datacenters connected with 1Gbit line (point-point), both ends of this circuit are N7K. There are few segments (l...

SSH has been enabled on our one and only 4507 switch for several months and working fine. A few weeks ago the switch had to be reloaded and when it was back online I couldn't SSH to it. When I connected via the console and typed "show ip ssh" it came...

Hi all,We had power failure catalyst 6509 and after the device boot up ssh does not work any more  below is error messagesAny ideas?thank youline con 0access-class 90 outlogging synchronousline vty 0 4access-class 90 inexec-timeout 60 0logging synchr...

Hi Netprowhen i issue the Command "Clear arp all" on 6500 ,did i lose all connectivity tos witch for a while?thanksjamil

Hello,Here is south korea. English is not my native language. I hope you get my drift.My customer have two 6509 switches with WiSMs. Each switch has one WiSM and runs 80 APs. So My customer is using total 160 APs.From a few month ago, Each WiSMs suff...

Dear All     Normally when we do HSRP with vPC on N7K the device will be Active/Standby in control plane but it will be Active/Active in data plane. In this case any traffic reach to standby device it can forward traffic directly to uplink which is n...

Ive been using GNS3 to run some of my practice labs and Im trying to use the SDM to get familiar with it. I have all the settings I believe I need on the router to be able to connect with the router. I can ping it from the command prompt, I can open ...

I am trying to track down an application response problem on my network (the traffic goes through a 6509 and FWSM).I noticed in one of my WireShark captures, that the client at times seems to be sending ackowledgements (ACKs) over and over again, and...

Hi all,I'm posting this thread to try and get an answer to a problem that I recently have with my stack switch. A brief history of my problem:a) I have three C3750-X switch stack together as my SAN switch and running on the new 15.0 release which is ...

Hi All,I have a customer with two Datacenters in two locations connected through Dark Fibre. There are two Dark Fibre links for redundancy. The connectivity is like below:N7K-DC1---(1/1) <----------------------------Dark Fibre-------------------->(1/...

We came across some weird finding when doing a show interface on one of our 3750X switch.  (Please see the output below).GigabitEthernet3/0/11 is down, line protocol is down (notconnect)  Hardware is Gigabit Ethernet, address is 44d3.ca17.c40b (bia 4...